Machine



(No Modell) I L. NICO'LAI. v v

GARDBOARD GROOVING MACHINE. No. 534,000. Patented Feb. 12 1895.

7M0 ATT0H0/E2ZQM? is fed through the machine) but in several To aZZ whom it may concern:

grooving machines, and the invention con- .of rolls is not an entirely practical one, as the UNITED STATES LUDWIG NIOOLAI, OF

PATENT OFFICE- DRESDEN, GERMANY.

CARDBOARD-GROOVING' MACHINE.

SPECIFICATION forming part of Letters Patent No. 534,000, dated February 12, 1895.

' Application filed March 10, 1893- Be it known that I, LUDWIG NIOOLAI, of Dresden, Germany, have invented an Improvement in Oardboard'Grooving Machines, of which the following is a specification.

My present invention relates to cardboard sists, mainly, in an improved arrangement of the pressure feed roll or rolls in relation to the knife or knives, as hereinafter described.

Cardboard grooving or scoring machines have heretofore had pressure rolls to assist in feeding the cardboard, but these rolls have been placed at some distance from and at each side of the knives. The shapes of the knives and rollers used were not such as to allow any other arrangement. My construction of knife is shown in Patent No. 442,7 38, dated December 16, 1890. The old disposition pairs of rolls and the knife or knives between them do not act on the card-board in the same line (in the direction in'which the card-board independent lines. Objectionable results follow, especially when thin or medium cardboard, or board. of inferior quality is being scored or grooved, because it does not of itself possess enough strength to carry it past the grooving knife untorn.

Thepresent invention obviates the trouble above mentioned. In my improved construction each bifurcated knife is provided with a roll in close proximity to its lowermain cutting edge preferably inithe same longitudinal line therewith. The rolls are quite 'narrow and can therefore be set in the transverse supporting beam in such manner that they work between the double blades of the bifurcated forward end of the knives, as shown in the drawings, in which Figure 1 is a front view of a portion of a card-board grooving machine having the improvement embodied therein. Fig. 2 is a sectional view on line 2,2 of Fig. 1, the knife and its carrier, however, being left in elevation. Fig. 3 is a front view of the knife.

In the drawings a is a feed roller, which can be driven by any suitable power; I), a table on which the paste-board to be grooved is laid.

c is a beam with two dovetail grooves in Serial in. 465,377. on model.

which may be fitted one or more holders (1 for one or more pressure rolls e, there being,

preferably one for each knifefialthough ad ditional rollers may be used at a distance on each side of the knife or knives, if desired. The knife, or knives, may be supported at the back of the beam 0, in the same manner as such roll is in front.

As shown,the pressure roll in the improved construction is located between the two blades of the bifurcated point of the knife, and its periphery, preferably milled, presses down on the pasteboard in advance of the cutting edges. This enables the pasteboard to be fed along without being torn, since it does not bring the largest strain caused by feeding along the pasteboard off at a distance from the line of resistance caused bythe knife, but directly in a line therewith.

Evidently, other means than those shown can be used for supporting the knives and rolls, without departing from the invention. The knives are preferably adjustable laterally through the medium of the holders, d, on the beam 0, and also have an angular adj ustment at their point of attachment with the lower end of the said holders d.

The pressure roll e may, if desired, be placed at such a distance in advance of the knife, f, that its circumference will be without the lines of the forward ends of the knife and thus not between the bifurcated ends. It may also be placed, if desired, to one side of the knife in closeproximity to the outer side of the bifurcated end, the line of resistance being still substantially in the plane of roll e though the preferable construction is that illustrated in the drawings.

What I claim is- 1. In apasteboard grooving machine the combination of one or more scoring or grooving knives, and a pressure feed idler roll 6 for each knife, adapted to bear on the pasteboard in front of its knife and to be rotated by contact with the pasteboard, substantially as described.

2. In a pasteboard grooving machine the combination of one or more scoring or grooving knives, having bifurcated ends, and a pressure feed idler roll e for each knife, adapted to bear on the pasteboard in front of its knife and between the sides of the bifur- ICO cated ends and adapted to be rotated by contact with the pasteboard, substantially as described.

3. In a pasteboard grooving machine the combination of one or more scoring or grooving knives having the forward ends bifurcated, a narrow vertically disposed pressure feed idler roll provided in advance of the lowermost straight blade of each knife at or near the line of its length, substantially as described.

4. In a pasteboard grooving machine the combination of one or more V-shaped scoring or grooving knives having bifurcated ends, each knife adjustably secured above the table of the machine, a pressure feed idler roll journaled t0 the frame of the machine in advance of the lower cutting blade of the V- described.

LUDWIG NIOOLAI. Witnesses:

CHARLES M, Cumm- HARRY M. TURK. 

